I CAN ADVICE YOU TO TWO OPTIONS:
FIRST: IF THERE IS A FEW INSTALLMENTS:
JUST SET IT FREE AND SELL IT ( JUST IN CASE OF YOU ARE PLANNING TO BUY A NEW ONE IN THE SUMMER NOW TILL JULY AS THE PRICES ARE SO NICE) OR YOU WHAT TO UPDATE YOURESLF WITH A NEW MODEL CAR

SECOND : IF YOU HAVE TOO MUCH INSTALLMENTS :
DO NOT INVOLVE TO SELL IT & IF YOU NEED THE MONEY JUST AT LEAST SELL IT WITH ITS BANK LOANS DURING THE BANK.

FINAL: I DID THE FIRST OPTION : I HAD HONDA ACCORD 2003 BEFORE AND SELL TO GET ALTIMA 2008

GOOD LUCK